Emperor Heizei

Quick Facts: Who was Emperor Heizei?

Subject:

Emperor Heizei

Known for:

The 51st Emperor of Japan, reigning from 806 to 809 CE.

Born:

774-09-25

Died:

824-08-05

Century / Era:

774s Historical Era Archive

Verified Source:

2Day Chrono-Wiki & Primary Historical Archives

Origins & Early Life

Emperor Heizei (平城天皇, Heizei-tennō; 773 – August 5, 824), also known as Heijō-tennō, was the 51st emperor of Japan, according to the traditional order of succession. Heizei's reign lasted from 806 to 809. Heizei was the eldest son of the Emperor Kanmu and empress Fujiwara no Otomuro. Heizei had three empresses and seven sons and daughters. Heizei is traditionally venerated at his tomb; the Imperial Household Agency designates Yamamomo no Misasagi (楊梅陵, Yamamomo Imperial Mausoleum), in Nara, as the location of Heizei's mausoleum.

Career & Major Achievements

The site is publicly accessible. Although one of the largest kofun monuments in Japan, archaeological investigations in 1962–1963 indicate that it was constructed in the early 5th century, and that portions of it were destroyed during the construction of Heijō-kyō, calling into question the designation by the Imperial Household Agency. Before he ascended to the throne, his liaison with Fujiwara no Kusuko, the mother of his one consort, caused a scandal. Because of this scandal his father considered depriving him of the rank of crown prince. 785: (Enryaku 4, 11th month): Heizei was appointed Crown Prince at the age of 12.

Enduring Legacy & Impact

April 9, 806 (Daidō 1, 17th day of the 3rd month): In the 25th year of Emperor Kanmu's reign, he died; and despite an ensuing dispute over who should follow him as sovereign, contemporary scholars then construed that the succession (senso) was received by his son. Shortly thereafter, Emperor Heizei is said to have acceded to the throne (sokui). His title Heizei was derived from the official name of the capital in Nara, Heizei Kyō. During Heizei's reign, the bodyguards were reorganized; the existing Imperial Bodyguards became the Left Imperial Bodyguards, while the Middle Bodyguards became the Right Imperial Bodyguards. Both sides were given a new Senior Commander; at this time Heizei appointed Sakanoue no Tamuramaro (758–811) as Senior Commander of the Imperial Bodyguards of the Right.

Chronological Milestones & Life Events

1. 774 (0774-09-25): Birth of Emperor Heizei — The 51st Emperor of Japan, reigning from 806 to 809 CE.
2. 824 (0824-08-05): Passing & Historical Legacy — Emperor Heizei passed away on 0824-08-05, leaving an enduring historical legacy.
3. 1962: 1962 Milestone — Although one of the largest kofun monuments in Japan, archaeological investigations in 1962–1963 indicate that it was constructed in the early 5th century, and that portions of it were destroyed during the construction of Heijō-kyō, calling into question the designation by the Imperial Household Agency.

Historical Fact-Check Quiz: Emperor Heizei

True or False: “Emperor Heizei was the first emperor to rule during the Daidō era.”

Answer (FALSE ❌): The Daidō era began with Emperor Kanmu's reign; Heizei reigned within this established period.

Contemporary Figures & Related Historical Timelines

• Kūkai — Contemporary (Born in 774) (774): Founder of the Shingon school of Buddhism, Kūkai was a pivotal figure in Japanese culture and religion.
• Han Yu — Contemporary (Died in 824) (824): Pioneering Tang Dynasty scholar, poet, and essayist who shaped Chinese literary tradition.
• Abraham Gottlob Werner — Shared historical date (09-25 · Born) (1749): Pioneering German geologist, known for establishing early theories of Earth's crust.
• Adolfo Suárez — Shared historical date (09-25 · Born) (1932): Key architect of Spain's transition to democracy, serving as Prime Minister 1976-1981.
• Adam Yauch — Shared historical date (08-05 · Born) (1964): Founding member of Beastie Boys; influential rapper, filmmaker, and Tibetan activist.
• Alec Guinness — Shared historical date (08-05 · Died) (2000): Iconic English actor celebrated for stage mastery and cinematic versatility.
• A. K. Fazlul Huq — Historical peer (Died in 1962) (1962): Pakistani statesman and jurist, known as Sher-e-Bangla, a founding father of Pakistan.
• Abdullah II of Jordan — Historical peer (Born in 1962) (1962): King of Jordan, a Hashemite monarch who assumed the throne in 1999.
• Abd el-Krim — Historical peer (Died in 1963) (1963): Moroccan revolutionary leader who spearheaded the revolt against French and Spanish Protectorates.
• Abdul Ghani Baradar — Historical peer (Born in 1963) (1963): Afghan politician and religious leader; co-founder of the Taliban.
• 774 Historical Timeline & Archive — Explore world events and figures from 774
• September 25 (09-25) On This Day — Historical birthdays and events on September 25
• 824 Historical Timeline & Archive — Explore world events and figures from 824
• August 5 (08-05) On This Day — Historical events and memorials on August 5

Frequently Asked Questions about Emperor Heizei